Process of making mordant colors.



UNITED STATES P TENT OFFICE.

MARTIN LANGE AND TADENSZ EMILEVVICZ, OF AMSTERDAM, NETHERLANDS.

PROCESS OF MAKING MORDANT COLORS.

SPEGlFIGATION forming part of Letters Patent No. 702,445, dated June 17,1902.

Application filed December 11, 1900. Serial No. 39,479- (Specimena) T000% whom it may concern.-

Be it known that we, MARTIN LANGE, chemist, a subject of the King ofPrussia,German Emperor, residing at Nicolas VVitsarkade 35, and TADENSZEMILE'WIOZ, chemist, a subject of the Emperor of Austria-Hungary,residing at Singel 325, Amsterdam, Netherlands, have invented certainnew and useful Improvements in Processes of Making Mordant Colors, ofwhich the following is a specification.

If in the nucleus of 1.8 dioxynaphthalene (Erdmomm Ann, 247, page 358)the residue of a fatty or aromatic carboxylic acid is introduced,ketones of the dioxynaphthalene are formed, which have the valuableproperty of dyeing on mordants of iron, aluminium, &c., in the manner ofalizarin colors. On aluminium mordants yellow to orange shades areobtained, according to the residue of carboxylic acid which isintroduced. The general formula for the new coloring-matters is mostprobable.

From differentprocessesforproducing these new colors can be used- 1. Byheating the carboxylic acids or their anhydrids with 1.8dioxynaphthalene under addition of condensing substances, as ZnCl SnClA501 H 80 &c.

2. By condensing 1.8 dioxynaphthalene with acid chloride or bromids ofthe general formula R- 0001 under addition of the above condensingsubstances.

3. By condensing the 1.8 dioxynaphthalene with the correspondingtrichlorids or bromide of the general formula R-C.Cl

4. By heating the mono or di acidyl derivatives of 1.8 dioxynaphthalcneof the formula with the above-mentioned condensing substances.

We obtain a dye producing a nice yellow on aluminium mordant by heatingin a suitable vessel sixty kilos 1.8 dioxynaphthalene with about onehundred kilos acetic acid or with thirty-nine kilos acetic anhydrid andabout eighty kilos ZnCl until the 1.8 dioxynaphthalene has disappeared.The product is purified in the usual manner. It crystallizes in smallyellowish needles, melting at about 101 centigrade.

By using process II the same stuff is obtained by mixing one hundred andsixtyeight kilos 1.8 dioxynaphthalene with about one hundred andtwenty-five kilos acetylchlorid and about one hundred kilos ZnCl andheating finally.

By using process III we heat sixteen kilos 1.8 dioxynaphthalene withtwenty kilos benzotrichlorid and one hundred andtwenty kilos dilutedalcohol to 70 to 80 centigrade till all the benzotrichlorid hasdisappeared. The dioxybenzoylnaphton dyes aluminium mordant brilliantorange. The dioxybenzonaphton crystallizes from diluted alcohol in longorange-brown needles, melting at about 122 centigrade.

By using process IV the same dye is obtained by melting the mono or diacetyldioxynaphthalene with ZnCl heating until the production of theketone is finished.

If we usein these examples instead of acetic acid one of the higherhomologues or the corresponding derivatives of same, we obtain thecorresponding dioxy ketones.

For the production of ketones of the 1.8 dioxynaphthalene with asubstance containing -the carboxylic-acid molecule; whereby saidcarboxylic-acid radical is bound to the nucleus of the 1.8dioxynaphthalene, substantially as described.

Signed at Amsterdam this 28th day of November, 1900.

MARTIN LANGE. TADENSZ EMILEWICZ.

Witnesses:

GUSTAV ORONHEIM, AUGUST SIEGFRIED DOCEN.

